(a) Every building hereafter built or located in this District which contains a dwelling unit or units, including duplexes, multiple dwellings and store buildings containing dwellings, shall meet the side yard and rear yard requirements of Section 1125.03, and conform to the requirements set forth in Sections 1125.04 through 1125.07 and 1125.09.
(b) Two -family and multiple dwelling buildings with attached dwelling units, which are of a row house nature with party walls between dwelling units and private or semiprivate entrances, shall meet the requirements of Section 1125.16.